Patents by Inventor Micah LEDBETTER
Micah LEDBETTER has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11803018Abstract: A light intensity modulator includes an input optical fiber; an output optical fiber; an optical arrangement having a lens, where the optical arrangement is configured to receive light from the input optical fiber, pass the light through the lens, and direct the light to the output optical fiber; and a piezoelectric device coupled to the lens, where the piezoelectric device is configured for moving the lens to alter overlap of the output optical fiber and the light directed to the output optical fiber to modulate intensity of light in the output optical fiber.Type: GrantFiled: January 10, 2022Date of Patent: October 31, 2023Assignee: HI LLCInventors: Argyrios Dellis, Ethan Pratt, Dakota Blue Decker, Kayla Wright-Freeman, Micah Ledbetter, Geoffrey Iwata
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Patent number: 11779251Abstract: A shielding arrangement for a magnetoencephalography (MEG) system includes a passively shielded enclosure having a plurality of walls defining the passively shielded enclosure, each of the plurality of walls including passive magnetic shielding material to reduce an ambient background magnetic field within the passively shielded enclosure; a vestibular wall extending from a first vertical wall to define, and at least partially separate, a vestibular area of the passively shielded enclosure adjacent the doorway and a user area of the passively shielded enclosure; and active shield coils distributed within the passively shielded enclosure and configured to further reduce the ambient background magnetic field within the user area of the passively shielded enclosure.Type: GrantFiled: May 24, 2021Date of Patent: October 10, 2023Assignee: HI LLCInventors: Jamu Alford, Micah Ledbetter, Ricardo Jiménez-Martínez, Ethan Pratt
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Patent number: 11779250Abstract: A magnetocardiography (MCG) system includes a passively shielded enclosure having walls defining the passively shielded enclosure, each of the walls including passive magnetic shielding material to reduce an ambient background magnetic field within the passively shielded enclosure; an MCG measurement device including optically pumped magnetometers (OPMs); and active shield coils within the passively shielded enclosure and stationary relative to the passively shielded enclosure and the MCG measurement device, wherein the active shield coils are configured to further reduce the ambient background magnetic field within a user area of the passively shielded enclosure.Type: GrantFiled: May 24, 2021Date of Patent: October 10, 2023Assignee: HI LLCInventors: Jamu Alford, Ethan Pratt, Micah Ledbetter, Ricardo Jiménez-Martínez
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Patent number: 11747413Abstract: A method of operating an optically pumped magnetometer (OPM) includes directing a light beam through a vapor cell of the OPM including a vapor of atoms; applying RF excitation to cause spins of the atoms to precess; measuring a frequency of the precession; for each of a plurality of different axes relative to the vapor cell, directing a light beam through the vapor cell, applying a magnetic field through the vapor cell along the axis, applying RF excitation to cause spins of the atoms to precess, and measuring a frequency of the precession in the applied magnetic field; determining magnitude and components of an ambient background magnetic field along the axes using the measured frequencies; and applying a magnetic field based on the components around the vapor cell to counteract the ambient background magnetic field to facilitate operation of the OPM in a spin exchange relaxation free (SERF) mode.Type: GrantFiled: August 27, 2020Date of Patent: September 5, 2023Assignee: HI LLCInventor: Micah Ledbetter
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Patent number: 11733320Abstract: An exemplary controller may include a single clock source configured to generate a single clock signal used to drive one or more components within a plurality of magnetometers and a plurality of differential signal measurement circuits configured to measure current output by a photodetector of each of the plurality of magnetometers.Type: GrantFiled: August 26, 2021Date of Patent: August 22, 2023Assignee: HI LLCInventors: Stephen Garber, Jerry Leung, Ethan Pratt, Hooman Mohseni, Jamu Alford, Dakota Blue Decker, Jeffery Kang Gormley, Michael Henninger, Scott Michael Homan, Teague Lasser, Micah Ledbetter, Scott Jeremy Seidman, Benjamin Siepser
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Patent number: 11698419Abstract: An exemplary wearable sensor unit includes 1) a magnetometer comprising a vapor cell comprising an input window and containing an alkali metal, and a light source configured to output light that passes through the input window and into the vapor cell along a transit path, and 2) a temperature control circuit external to the vapor cell and configured to create a temperature gradient within the vapor cell, the temperature gradient configured to concentrate the alkali metal within the vapor cell away from the transit path of the light.Type: GrantFiled: April 30, 2020Date of Patent: July 11, 2023Assignee: HI LLCInventors: Stephen Garber, Ethan Pratt, Jeffery Kang Gormley, Scott Michael Homan, Scott Jeremy Seidman, Dakota Blue Decker, Jamu Alford, Michael Henninger, Teague Lasser, Micah Ledbetter, Jerry Leung, Hooman Mohseni, Benjamin Siepser
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Patent number: 11686824Abstract: Embodiments discussed herein refer to using LiDAR systems that uses a rotating polygon with a multi-facet mirror. Such multi-facet galvanometer mirror arrangements generate a point map that has reduced curvature.Type: GrantFiled: November 13, 2019Date of Patent: June 27, 2023Assignee: Innovusion, Inc.Inventors: Micah Ledbetter, Junwei Bao, Rui Zhang, Yimin Li
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Patent number: 11644543Abstract: Embodiments discussed herein refer to using LiDAR systems that uses a rotating polygon with a multi-facet mirror. Such multi-facet galvanometer mirror arrangements generate a point map that has reduced curvature.Type: GrantFiled: November 19, 2021Date of Patent: May 9, 2023Assignee: Innovusion, Inc.Inventors: Micah Ledbetter, Junwei Bao, Rui Zhang, Yimin Li
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Patent number: 11604237Abstract: A magnetic field measurement system includes a magnetometer having at least one vapor cell, at least one light source to direct at least two light beams through the vapor cell(s), and at least one detector; at least one magnetic field generator to modify an external magnetic field experienced by the vapor cell(s); and at least one processor configured for: applying a first modulation pattern, bmod(t), to the magnetic field generator(s) to modulate a magnetic field at the vapor cell(s), where bmod(t)=[cx cos(?t)+sx sin(?t), cy cos(?t)+sy sin(?t), cz cos(?t)+sz sin(?t)], where cx, sx, cy, sy, cz, and sz are amplitudes and ? is a frequency; directing the light source(s) to direct the light beams through the vapor cell(s); receiving signals from the detector(s); and determining three orthogonal components of the external magnetic field using the received signals. Multi-frequency modulation patterns can alternatively be used.Type: GrantFiled: January 5, 2022Date of Patent: March 14, 2023Assignee: HI LLCInventors: Micah Ledbetter, Benjamin Shapiro, Ethan Pratt, Ricardo Jimenez-Martinez, Argyrios Dellis, Kayla Wright-Freeman, Geoffrey Iwata, Michael Romalis
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Publication number: 20220397618Abstract: A magnetic field measurement system includes a magnetometer having at least one vapor cell, at least one light source to direct at least two light beams through the vapor cell(s), and at least one detector; at least one magnetic field generator to modify an external magnetic field experienced by the vapor cell(s); and at least one processor configured for: applying a first modulation pattern, bmod(t), to the magnetic field generator(s) to modulate a magnetic field at the vapor cell(s), where bmod(t)=[cx cos(?t)+sx sin(?t), cy cos(?t)+sy sin(?t), cz cos(?t)+sz sin(?t)], where cx, sx, cy, sy, cz, and sz are amplitudes and ? is a frequency; directing the light source(s) to direct the light beams through the vapor cell(s); receiving signals from the detector(s); and determining three orthogonal components of the external magnetic field using the received signals. Multi-frequency modulation patterns can alternatively be used.Type: ApplicationFiled: January 5, 2022Publication date: December 15, 2022Inventors: Micah Ledbetter, Benjamin Shapiro, Ethan Pratt, Ricardo Jimenez-Martinez, Argyrios Dellis, Kayla Wright-Freeman, Geoffrey Iwata, Michael Romalis
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Patent number: 11525869Abstract: An exemplary magnetic field measurement system includes a wearable sensor unit that includes a magnetometer and a twisted pair cable interface assembly electrically connected to the magnetometer.Type: GrantFiled: August 26, 2021Date of Patent: December 13, 2022Assignee: HI LLCInventors: Stephen Garber, Jamu Alford, Michael Henninger, Jeffery Kang Gormley, Dakota Blue Decker, Scott Michael Homan, Teague Lasser, Micah Ledbetter, Jerry Leung, Hooman Mohseni, Ethan Pratt, Scott Jeremy Seidman, Benjamin Siepser
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Patent number: 11506730Abstract: A magnetic field measurement system includes a wearable device having a plurality of wearable sensor units. Each wearable sensor unit includes a plurality of magnetometers and a magnetic field generator configured to generate a compensation magnetic field configured to actively shield the plurality magnetometers from ambient background magnetic fields. A strength of a fringe magnetic field generated by the magnetic field generator of each of the wearable sensor units is less than a predetermined value at the plurality of magnetometers of each wearable sensor unit included in the plurality of wearable sensor units.Type: GrantFiled: April 30, 2020Date of Patent: November 22, 2022Assignee: HI LLCInventors: Jamu Alford, Michael Henninger, Stephen Garber, Jeffery Kang Gormley, Dakota Blue Decker, Scott Michael Homan, Teague Lasser, Micah Ledbetter, Jerry Leung, Hooman Mohseni, Ethan Pratt, Scott Jeremy Seidman, Benjamin Siepser
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Patent number: 11480632Abstract: A magnetic field measurement system includes at least one magnetometer having a vapor cell, a light source to direct light through the vapor cell, and a detector to receive light directed through the vapor cell; at least one magnetic field generator disposed adjacent the vapor cell; and a feedback circuit coupled to the at least one magnetic field generator and the detector of the at least one magnetometer. The feedback circuit includes a first feedback loop that includes a first low pass filter with a first cutoff frequency and a second feedback loop that includes a second low pass filter with a second cutoff frequency. The first and second feedback loops are configured to compensate for magnetic field variations having a frequency lower than the first or second cutoff frequency, respectively.Type: GrantFiled: April 20, 2021Date of Patent: October 25, 2022Assignee: HI LLCInventors: Micah Ledbetter, Ricardo Jiménez-Martínez, Ethan Pratt, Hooman Mohseni, Jamu Alford
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Patent number: 11474129Abstract: A method of making an array of vapor cells for an array of magnetometers includes providing a plurality of separate vapor cell elements, each vapor cell element including at least one vapor cell; arranging the vapor cell elements in an alignment jig to produce a selected arrangement of the vapor cells; attaching at least one alignment-maintaining film onto the vapor cell elements in the alignment jig; transferring the vapor cells elements and the at least one alignment-maintaining film from the alignment jig to a mold; injecting a bonding material into the mold and between the vapor cell elements to bond the vapor cell elements in the selected arrangement; removing the at least one alignment maintaining film from the vapor cell elements; and removing the bonded vapor cells elements in the selected arrangement from the mold to provide the array of vapor.Type: GrantFiled: November 3, 2020Date of Patent: October 18, 2022Assignee: HI LLCInventors: Scott Jeremy Seidman, Ethan Pratt, Jeffery Kang Gormley, Dakota Blue Decker, Micah Ledbetter
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Publication number: 20220299584Abstract: A magnetic field measurement system includes a light source that emits a light beam; an optical fiber to transmit the light beam; a variable optical attenuator to increase stability of an intensity of the light beam; a beam splitter to divide the light beam into an OPM light beam and a monitor light beam; a monitor detector to detect the monitor light beam and generate a monitor signal; a vapor cell with alkali metal atoms disposed therein and configured for transmission of the OPM light beam through the vapor cell; an OPM detector to detect the OPM light beam after transmission through the vapor cell and generate an OPM signal; and a group delay filter to combine the monitor signal and the OPM signal to generate a reduced noise OPM signal, where the group delay filter accounts for a phase difference between the monitor signal and the OPM signal.Type: ApplicationFiled: March 8, 2022Publication date: September 22, 2022Inventors: Micah Ledbetter, Ricardo Jimenez-Martinez, Geoffrey Iwata
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Publication number: 20220221665Abstract: A light intensity modulator includes an input optical fiber; an output optical fiber; an optical arrangement having a lens, where the optical arrangement is configured to receive light from the input optical fiber, pass the light through the lens, and direct the light to the output optical fiber; and a piezoelectric device coupled to the lens, where the piezoelectric device is configured for moving the lens to alter overlap of the output optical fiber and the light directed to the output optical fiber to modulate intensity of light in the output optical fiber.Type: ApplicationFiled: January 10, 2022Publication date: July 14, 2022Inventors: Argyrios Dellis, Ethan Pratt, Dakota Blue Decker, Kayla Wright-Freeman, Micah Ledbetter, Geoffrey Iwata
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Patent number: 11360164Abstract: An array of optically pumped magnetometers includes a vapor cell arrangement having a wafer defining one or more cavities and alkali metal atoms disposed in the cavities to provide an alkali metal vapor; an array of light sources, each of the light sources arranged to illuminate a different portion of the one or more cavities of the vapor cell arrangement with light; at least one mirror arranged to reflect the light from the array of light sources after the light passes through the one or more cavities of the vapor cell arrangement; and an array of detectors to receive light reflected by the at least one mirror, wherein each of the detectors is arranged to receive light originating from one of the light sources.Type: GrantFiled: March 16, 2020Date of Patent: June 14, 2022Assignee: HI LLCInventors: Micah Ledbetter, Hooman Mohseni, Jamu Alford, Ethan Pratt, Daniel Sobek
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Patent number: 11293999Abstract: A magnetic field generator includes a first planar substrate, a second planar substrate positioned opposite to the first planar substrate and separated from the first planar substrate by a gap, a first wiring set on the first planar substrate, a second wiring set on the second planar substrate, and one or more interconnects between the first planar substrate and the second planar substrate. The one or more interconnects electrically connect the first wiring set with the second wiring set to form a continuous electrical path. The continuous electrical path forms a conductive winding configured to generate, when supplied with a drive current, a first component of a compensation magnetic field configured to actively shield a magnetic field sensing region located in the gap from ambient background magnetic fields along a first axis that is substantially parallel to the first planar substrate and the second planar substrate.Type: GrantFiled: April 30, 2020Date of Patent: April 5, 2022Assignee: HI LLCInventors: Jamu Alford, Michael Henninger, Stephen Garber, Jeffery Kang Gormley, Dakota Blue Decker, Scott Michael Homan, Teague Lasser, Micah Ledbetter, Jerry Leung, Hooman Mohseni, Ethan Pratt, Scott Jeremy Seidman, Benjamin Siepser
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Publication number: 20220082667Abstract: Embodiments discussed herein refer to using LiDAR systems that uses a rotating polygon with a multi-facet mirror. Such multi-facet galvanometer mirror arrangements generate a point map that has reduced curvature.Type: ApplicationFiled: November 19, 2021Publication date: March 17, 2022Applicant: Innovusion Ireland LimitedInventors: Micah Ledbetter, Junwei Bao, Rui Zhang, Yimin Li
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Patent number: 11269027Abstract: An optically pumped magnetometer includes a vapor cell; at least one light source configured to produce a pump light beam and a probe light beam; a lens disposed between the at least one light source and the vapor cell; a quarter wave plate disposed between the lens and the vapor cell; a mirror configured to receive the pump light beam and probe light beam after passing through the vapor cell and reflect the pump light beam and probe light beam back through the vapor cell, the quarter wave plate, and the lens; and at least one detector configured to receive the probe light beam reflected by the mirror.Type: GrantFiled: April 16, 2020Date of Patent: March 8, 2022Assignee: HI LLCInventors: Hooman Mohseni, Ethan Pratt, Ricardo Jiménez-Martínez, Micah Ledbetter